U2 has a concert that starts
in 17 minutes and they must all cross a bridge to
get there. All four men begin on the same side of
the bridge.

You must help them cross to
the other side. It is night and there is ONLY one
flashlight. A maximum of two people can cross at one
time.

Any party who crosses (either
1 or 2 people) must have the flashlight with them.

The flashlight must be walked back
and forth, it cannot be thrown, rolled, transported,
teleported etc etc ... across the bridge. Each band
member walks at a different speed and a PAIR of men
walking across the bridge will travel at the speed
of the slowest member of it's party.

Example. If Bono and Larry walk across
first, 10 minutes have elapsed when they get to the
other side of the bridge. If Larry then returns with
the flashlight, 20 minutes has elapsed and you've
failed your mission.